//open image modal dialog
function openPhotoGalleryImage(docid) {

    //open modal dialog
    openModalDialog();

    //set content by ajax request
    sendAjaxRequest(rooturl + "ajaxlargeimage.aspx?fileid=" + docid, "modalWindow", "");
}

//open image modal dialog
function openPhotoGalleryNews(docid, nodepos) {

    //open modal dialog
    openModalDialog();

    //set content by ajax request
    sendAjaxRequest(rooturl + "ajaxlargeimage.aspx?docid=" + docid+"&nodepos="+nodepos, "modalWindow", "");
}

//open modal dialog
function openModalDialog() {
    //display div modal dialogs
    $('modalWindow').style.display = $('modalBackground').style.display = 'block';

    //special < IE7 -only processing for windowed elements, like select	
    if (window.XMLHttpRequest == null) {
        if ($('hideType') != null) {
            var type = $('hideType').value;

            if (type == 'iframe')
                $('modalIframe').style.display = 'block';
            if (type == 'replace')
                ReplaceSelectsWithSpans();
        }
    }

    //call once to center everything
    OnWindowResize();

    //hook events
    if (window.attachEvent)
        window.attachEvent('onresize', OnWindowResize);
    else if (window.addEventListener)
        window.addEventListener('resize', OnWindowResize, false);
    else
        window.onresize = OnWindowResize;

    // we won't bother with using javascript in CSS to take care keeping the window centered
    if (document.all)
        document.documentElement.onscroll = OnWindowResize;
}

//event: on window resize
function OnWindowResize() {
    //we only need to move the dialog based on scroll position if
    //we're using a browser that doesn't support position: fixed, like < IE 7
    var left = window.XMLHttpRequest == null ? document.documentElement.scrollLeft : 0;
    var top = window.XMLHttpRequest == null ? document.documentElement.scrollTop : 0;
    var div = $('modalWindow');

    //set current position
    div.style.left = Math.max((left + (GetWindowWidth() - div.offsetWidth) / 2), 0) + 'px';
    div.style.top = Math.max((top + (GetWindowHeight() - div.offsetHeight) / 2), 0) + 'px';
}

//event: on window close
function OnModalWindowClose() {
    $('modalWindow').style.display = $('modalBackground').style.display = 'none';

    // special IE-only processing for windowed elements, like select	
    if (document.all) {
        if ($('hideType') != null) {
            var type = $('hideType').value;
            alert("OK");
            if (type == 'iframe')
                $('modalIframe').style.display = 'none';

            if (type == 'replace')
                RemoveSelectSpans();
        }
    }

    if (window.detachEvent)
        window.detachEvent('onresize', OnWindowResize);
    else if (window.removeEventListener)
        window.removeEventListener('resize', OnWindowResize, false);
    else
        window.onresize = null;

}

/* These functions deal with IE's retardedness in not allowing divs to 
* cover select elements by replacing the select elements with spans */

//IE: remove select spans
function RemoveSelectSpans() {
    var selects = document.getElementsByTagName('select');

    for (var i = 0; i < selects.length; i++) {
        var select = selects[i];

        if (select.clientWidth == 0 || select.clientHeight == 0 ||
			select.nextSibling == null || select.nextSibling.className != 'selectReplacement') {
            continue;
        }

        select.parentNode.removeChild(select.nextSibling);
        select.style.display = select.cachedDisplay;
    }
}

//IE: replace selects with spans
function ReplaceSelectsWithSpans() {
    var selects = document.getElementsByTagName('select');

    for (var i = 0; i < selects.length; i++) {
        var select = selects[i];

        if (select.clientWidth == 0 || select.clientHeight == 0 ||
			select.nextSibling == null || select.nextSibling.className == 'selectReplacement') {
            continue;
        }

        var span = document.createElement('span');

        // this would be "- 3", but for that appears to shift the block that contains the span 
        //   one pixel down; instead we tolerate the span being 1px shorter than the select
        span.style.height = (select.clientHeight - 4) + 'px';
        span.style.width = (select.clientWidth - 6) + 'px';
        span.style.display = 'inline-block';
        span.style.border = '1px solid rgb(200, 210, 230)';
        span.style.padding = '1px 0 0 4px';
        span.style.fontFamily = 'Arial';
        span.style.fontSize = 'smaller';
        span.style.position = 'relative';
        span.style.top = '1px';
        span.className = 'selectReplacement';

        span.innerHTML = select.options[select.selectedIndex].innerHTML +
			'<img src="custom_drop.gif" alt="drop down" style="position: absolute; right: 1px; top: 1px;" />';

        select.cachedDisplay = select.style.display;
        select.style.display = 'none';
        select.parentNode.insertBefore(span, select.nextSibling);
    }
}

/* utiltiy functions */

//tools: get window width
function GetWindowWidth() {
    //calculate width
    var width =
		document.documentElement && document.documentElement.clientWidth ||
		document.body && document.body.clientWidth ||
		document.body && document.body.parentNode && document.body.parentNode.clientWidth ||
		0;

    //return
    return width;
}

//tools: get window height
function GetWindowHeight() {
    //calculate height
    var height =
		document.documentElement && document.documentElement.clientHeight ||
		document.body && document.body.clientHeight ||
  		document.body && document.body.parentNode && document.body.parentNode.clientHeight ||
  		0;

    //return
    return height;
}

//tools: get element by id
function $(id) {
    //return
    return document.getElementById(id);
}


//open post sendtofriend modal dialog
function openSendToFriendModalDialog(url, senderemail, sendername, recipientemail, message, validate, title, recipienname) {
    //open modal dialog
    if (validate == 2) {
        advancedHeight = 460;
        advancedWidth = 611;
        openModalDialog();
        validate = 0;
    }

    //submit form
    if (validate == 1) {
        //set input values
        senderemail = document.getElementById("senderemail").value;
        sendername = escape(document.getElementById("sendername").value);
        recipientemail = document.getElementById("recipientemail").value;
        message = escape(document.getElementById("message").value.substring(0, 1100));
    }

    //set content by ajax request
    sendAjaxRequest(rooturl + "ajaxsendtofriend.aspx?url=" + url + "&senderemail=" + senderemail + "&sendername=" + sendername + "&recipientemail=" + recipientemail + "&recipienname=" + recipienname + "&validate=" + validate + "&message=" + message + "&title=" + title, "modalWindow", "");
}